Grow Room Question

Hi, just gotta couple of questions, im growing in a very limited space, so i just wanted to know if CFLz is the best go, and if im growing 1plant that is said to grow (70cm) how many CFL'z would i need? (ive done some research and seen that 6500K is for vegging/sprouting and 2700k is for flowering, would i need to switch bulbs when flowering?) Someone told me you can buy a reflective paint, is this true??
 
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